Hydraulic packing-shield.



G. H. WATTS. HYDRAULIC PAQKING SHIELD.

APILIOAT-ION FILED OUT. 11, 1912.

Patented Sept. 16,1913.

" INVENTOH Uharlasli m d; ATTORNEYS lCE,

CHARLES H. \VATTS, OF NORTH BRADDOCK, PENNSYLVANIA.

HYDRAULIC PACKING-SHIELD.

Specification of Letters Yatent.

Patented Sept. 16, 1913.

Application filed October 11, 1912. Scria1No.725,186.

To all Qrhom it may concern:

3e it'lmownthat 1, CHARLES H. VVa'r'rs, a citizen of the United States o't America, residing at North Braddock, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful lniprovements in Hydraulic Packing-Shields, of which the following is a specification, reference beinghad therein to the accompanyingdrawing. I i

' This invention relates to a hydraulic packing'shicld, and more particularly to a me tallic shield for packing used in connection ith piston heads and other movable bodies for establisl'iing anon-leakable connection between the movable and stationary bodies. The primary object of my invention is to provide- 'a sectional telescopic: channelshaped yioldablemeiallic shield made of copper or other anti-frictional metal that will readily accommodate itself to packing and support and prevent undue wear, dete rioration and breaking down of packing.

' to "accomplish the Another object of this invention is to provide a yieldableshield for-hydraulic packing that has provision for the expanding "of packing by Water pressure, without the water circulating 'n the shield.

A further Ol)]8(3tof this invention is to provide an expans'ible shield that can be used in connection with leather, rubber, hemp or other stand-packing material.

'A still further object ofthis invention is above results by a mechanical construction that is inexpensive to manufacture, durable, easy to install, and highly efficient for thepurposes for which it is intended.

YVith the above and other objects in view the invention resides in the novel construe, tion, combination and arrangement of parts tof-be. hereinafter specifically dcscrilicd and then claimed. l

Reference will now be had to the drawwherein like numerals denote corresponding par'ts through out the several views, in which Figure .1 is a longitudinal sectionalview of'a portion of a cylinder and piston illustrating the shield in connection therewith, liig. 2 is a perspective view ota portion of the shield, Fig. 3 is. a similar view of another portion of the shield, Fig, 4: is a perspective view of the shield.

The reference numeral 1 denotes a sta- 'tionary body asa cylinder and movable in piston rod 2 havingrethis cylinder: is a and 4: and a folmovable piston sections 0 lower head 5, said head being attached to the p ston section 3 by screw bolts 6 and said pistonsections and said head held upon the reduced and of'said piston rod by a nut 7. The piston sections 3 and 4: have the peripheral edges thereof providedwith annular'reccsses 8 and communicating with these recesses are openings 9 in the piston section t and openings 10 in the follower head 5, these openings permitting of water pressure entering the recesses 8 to expand the contents of said recesses, besides preventing the circulation cit-water within said reccsses. Located in each recess is a containing packing, each shield comprising three nmi-corrodible metallic telescopic Channel-shaped sections 11, 12 and 13. An end of each section has a pin 14 that extends into a longitudiualslot 15 formed in the end of an adjoining section. It is preferable to arrange the sections 11, 12 and 13 with telescopic or overlapping ends and with a slot in one end of a section and a pin at the opposite end of the section. It is obvious that one end of the section .will' extend over an adjoining section and the other end of the same section under an adjoining section. By this arrangement there is a continuous channel within the'scctions capable of bold ing packing 16, the packing projecting ,Erom the edges of the sections to pwscnt a wearing surface 17, and rings 18 of leather or suitable materlal. can be arranill at the edges of the sectional shield die "by the shieldand packing will snugly fit Wham the recess 8. a

The walls of the shield confront the piston sections 3 and 4c and which could therefore be termed the inner walls, or concave, as shown in Figs. 2 to 4: inclusive and when pressure is brought to bear upon the wearing surface 17 of the packing, the inner walls of the'shield tend to flatten and therebyforce the side walls of the shield into engagement with the packing, tobrace and maintain the same in form while such pressure is exerted.

shield It is to be understood that no packing glands are necessary and thatthe packing rings are made to lit the bore of the cylinder and the shields adjusted beforebeing placed in the recesses of the plunger or piston. The shields are retained in position by the follower head and the piston sections without non-corrodible any strain upon the shields; The ends of the shlelds can be connected with or without slots and pins and 1n some instances the concave walls of the shield can be dis-.

pensed with.

It is thought that the operation and utility of the shield will be apparent without further description, and while'in the drawing there is illustrated a preferred embodiment of my invention is to be understood that the structural elements are susceptible to'such changes, as in size, shape and manner of assemblage as fall within the scope of the appended claims.

What I claim is 1. A piston packing shield comprising metallic channel-shaped telescopic expansible sections capable of supporting packing, the inner wall of each of said sections capable of being flattened.

2. A piston packing shield comprising non-corrodible metallic channel-shaped telescopic expansible sections having concave inner walls capable of being flattened.

3. As a new article of manufacture, a piston packing comprising a shield formed of a plurality of telescopic channel-shaped sections, and means for interlocking the ends of said sections together.

4. A piston packing comp-rislng in com bination, a shield'in the form of an annulus and consisting of a plurality of channelshaped telescopic sections adjustably connected together, packing mounted in and projecting from said shields, and rings mounted upon said packing and abutting against the edges of said sections.

5. A piston packing comprising in combination, a'wadjus'table shield in the form of anannulus consisting of a plurality of channel-shaped sections, the inner wall of each of said sections being concave, the inner wall of one section restingupon the inner wall bination, a shield formed bination, an adjustable shield in the form of an annulus consisting of a plurality of channel-shaped sections, the inner, wall of each of said sections being concave, the inner wall of one section resting upon the inner wall of an adjacent section, said inner Wall of each section capable of being flattened thereby forcing the side Walls ofeach section toward each other, and means for interlocking the sections together.

7. A piston packing comprising in comtelescopic interlocked sections, and packing mounted in said sections.

S. A bination, a shield formed of aplurality of telescopic interlocked sections, packing mounted in said sections and projecting therefrom, and rings mounted upon the proof a plurality'of )iston ackin com risin .in comjecting portion of'the packing and abutting 1 against the edges of said sections.

9. A piston packing comprising in combination, a shield formed of a plurality of telescopic interlocked sections, f packing mounted in said sections and projecting therefrom, and rings mounted upon the projecting portion of the packing and abutting against the edges of said sections, the inner wall of each of said sections being concave and capable of being flattened whereby the side walls will be caused to grip the packing.

In testimony whereof I aflix my signature ,in the presence of two witnesses.

CHARLES WATTS. WVitnesses:

- J. P. 'APPLEMAN, Jos. K. WALLACE. 

